Claude Sonnet 4.6 (Vertex AI (Anthropic)) API
About
Build advanced reasoning agents with Claude Sonnet 4.6 (Vertex AI (Anthropic)), a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $3.00/1M input and $15.00/1M output tokens, native tool calling support. Access Claude Sonnet 4.6 (Vertex AI (Anthropic)) via the LLM Gateway API with up to 64K output tokens.
Capabilities
Input Modalities
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Output Modalities
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Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
64K
Tokens
Pricing
Standard (per 1M tokens)
Input
$3.00
Output
$15.00
Caching (per 1M tokens)
Read
$0.30
Frequently Asked Questions
Claude Sonnet 4.6 (Vertex AI (Anthropic)) by LLM Gateway costs $3.00 per 1M input tokens and $15.00 per 1M output tokens. Cached reads cost $0.30 per 1M tokens.
Model Details
ID
vertex-anthropic/claude-sonnet-4-6
Provider
LLM GatewayFamily
claude-sonnet
Release Date
Feb 17, 2026
Knowledge Cutoff
Aug 31, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
LLMGATEWAY_API_KEY
API Base URL
https://api.llmgateway.io/v1